Leviticus 21:14

“A widow, etc.] The high priest might not marry, whether the widow of a priest or of an Israelite, as Aben Ezra, that is, of any Israelite that was not of the priesthood; and this, whether a widow after espousals, or after marriage, as runs the Jewish canon f762; the meaning is, that if she was betrothed to a man, and that man died before he married her, and so was a virgin; yet being betrothed to him was reckoned as his widow; and such an one the high priest might not marry, any more than one that had been left a widow, having being married: though, according to the same constitutions, if he had betrothed a widow, and after that was appointed an high priest, he might marry her, and an…”